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Wisconsin

$60+ Cheap flights from Ontario (ONT) to Wisconsin

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/10. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MKE
Mar 20 — Mar 271
Fri 3/20
Fri 3/27
1 adult, Economy
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Cheap flight deals from Ontario to Wisconsin

Cheapest flights from Ontario to Wisconsin
Explore the most affordable flight options available from Ontario to Wisconsin. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 18, 2026.

This Kiwi.com deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/52:44 pm
ONT
-
ORD
1 stop14h 03m
Frontier
Tue 5/129:18 pm
ORD
-
ONT
1 stop18h 22m
Frontier
Deal found 2/15$146
This Kiwi.com deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/217:29 pm
ONT
-
ORD
1 stop9h 18m
Multiple Airlines
Mon 4/278:52 pm
ORD
-
ONT
1 stop18h 48m
Multiple Airlines
Deal found 2/17$164
This Trip.com deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/187:18 pm
ONT
-
ORD
1 stop9h 29m
Frontier
Sat 4/254:55 pm
ORD
-
ONT
1 stop7h 47m
Frontier
Deal found 2/15$166
This Kiwi.com deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/38:40 am
ONT
-
MSP
1 stop10h 35m
Frontier
Tue 3/106:21 pm
MSP
-
ONT
1 stop7h 38m
Frontier
Deal found 2/17$169
This Kiwi.com deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/217:29 pm
ONT
-
ORD
1 stop9h 18m
Frontier
Mon 4/277:43 am
ORD
-
ONT
2 stops42h 12m
Frontier
Deal found 2/17$170
This Trip.com deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/168:59 pm
ONT
-
ORD
1 stop7h 48m
Frontier
Mon 4/205:25 am
ORD
-
ONT
1 stop13h 13m
Frontier
Deal found 2/15$172
This Kiwi.com deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/227:29 pm
ONT
-
ORD
1 stop9h 18m
Multiple Airlines
Mon 4/278:52 pm
ORD
-
ONT
1 stop18h 48m
Multiple Airlines
Deal found 2/17$176
This Trip.com deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/78:59 pm
ONT
-
ORD
1 stop7h 48m
Frontier
Sun 5/105:25 am
ORD
-
ONT
1 stop13h 13m
Frontier
Deal found 2/15$178
This Kiwi.com deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2912:59 am
ONT
-
MSP
1 stop20h 59m
Frontier
Sun 5/36:45 am
MSP
-
ONT
1 stop26h 46m
Frontier
Deal found 2/17$179
This American Airlines deal was found by Cheapflights users on 2/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/912:19 pm
ONT
-
ORD
1 stop10h 13m
American Airlines
Sat 5/232:21 pm
ORD
-
ONT
1 stop9h 36m
American Airlines
Deal found 2/14$183
This Trip.com deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/78:59 pm
ONT
-
ORD
1 stop7h 48m
Frontier
Fri 5/89:18 pm
ORD
-
ONT
1 stop15h 26m
Frontier
Deal found 2/16$184
This Kiwi.com deal was found by Cheapflights users on 2/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/105:33 pm
ONT
-
ORD
1 stop14h 17m
Frontier
Tue 5/199:18 pm
ORD
-
ONT
1 stop23h 16m
Frontier
Deal found 2/14$185

Find flight deals from Ontario to Wisconsin

Keep the following information in mind while searching for Ontario to Wisconsin flight deals. Data was last updated February 18, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$146
(Kiwi.com)

One-way from

$60
(Trip.com)

Popular in

February

Cheapest in

August

Average price

$494
Provider with most accurate pricing for Los Angeles-Milwaukee-Mitchell flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-Milwaukee-Mitchell flights.
Search Deals
From Ontario to Wisconsin
Search Deals
One-way flight from Ontario to Wisconsin
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($43 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Wisconsin that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 18, 2026.
Use the filters below to find and compare flights from Ontario to Wisconsin that are best for you.

Fly from

Ontario

Fly to

Wisconsin

Route

Depart

Return

Price

OntarioMinneapolis

ONT - MSP

ONTMSP

Ontario

Wed 3/4

8:40 am-10:59 pm

1 stop12h 19m

Minneapolis St Paul

Tue 3/10

6:21 pm-11:59 pm

1 stop7h 38m

$190

OntarioMinneapolis

ONT - MSP

ONTMSP

Ontario

Sun 5/10

12:59 am-11:58 pm

1 stop20h 59m

Minneapolis St Paul

Fri 5/15

6:45 am-11:55 pm

1 stop19h 10m

$190

OntarioMinneapolis

ONT - MSP

ONTMSP

Ontario

Thu 4/9

6:20 am-5:53 pm

1 stop9h 33m

Minneapolis St Paul

Mon 4/13

1:25 pm-11:56 pm

1 stop12h 31m

$190

OntarioMinneapolis

ONT - MSP

ONTMSP

Ontario

Tue 4/14

12:59 am-11:58 pm

1 stop20h 59m

Minneapolis St Paul

Sun 4/19

1:50 pm-7:31 am

1 stop19h 41m

$201

OntarioMinneapolis

ONT - MSP

ONTMSP

Ontario

Wed 4/29

12:59 am-11:58 pm

1 stop20h 59m

Minneapolis St Paul

Mon 5/4

6:45 am-8:04 pm

2 stops15h 19m

$235

OntarioMadison

ONT - MSN

ONTMSN

Ontario

Mon 3/9

6:15 am-7:06 pm

1 stop10h 51m

Madison Truax Field

Mon 3/16

7:51 pm-11:59 pm

1 stop6h 08m

$235

OntarioMinneapolis

ONT - MSP

ONTMSP

Ontario

Tue 4/7

6:20 am-3:02 pm

1 stop6h 42m

Minneapolis St Paul

Mon 4/13

1:25 pm-11:56 pm

1 stop12h 31m

$240

OntarioMinneapolis

ONT - MSP

ONTMSP

Ontario

Wed 4/8

6:20 am-3:02 pm

1 stop6h 42m

Minneapolis St Paul

Fri 4/17

1:50 pm-11:55 pm

1 stop12h 05m

$240

OntarioMinneapolis

ONT - MSP

ONTMSP

Ontario

Thu 5/14

12:59 am-11:58 pm

1 stop20h 59m

Minneapolis St Paul

Tue 5/19

8:15 am-11:55 pm

1 stop17h 40m

$251

OntarioChicago

ONT - ORD

ONTORD

Ontario

Sat 3/14

11:59 pm-6:02 am

Nonstop4h 03m

Chicago O'Hare Intl

Mon 3/16

7:52 pm-10:18 pm

Nonstop4h 26m

$262

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/18

Showing 1-10 of 60 results
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Best time to book a flight from Ontario to Wisconsin

Have a flexible travel schedule? Discover the best time to fly to Wisconsin from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Wisconsin

What is the cheapest month to book a flight from Ontario to Wisconsin?

Currently, May is the cheapest month in which you can book a flight from Ontario to Wisconsin (average of $98). Flying from Ontario to Wisconsin in February is currently the most expensive (average of $283). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Wisconsin

Get insights into the airlines that provide service to Wisconsin. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Wisconsin. Reviews last updated February 18, 2026.
Read reviews from past customers who have flown Southwest, Delta, and United Airlines from Ontario to Wisconsin. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,294 reviews

Crew

8.6

Entertainment

7.5

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Southwest
8.0
Very good
4,294 reviews
Southwest
8.0
Very good
4,294 reviews

Crew

8.6

Entertainment

7.5

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Delta
7.9
Good
8,207 reviews
Southwest
8.0
Very good
4,294 reviews

Crew

8.6

Entertainment

7.5

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
United Airlines
7.4
Good
9,312 reviews
Southwest
8.0
Very good
4,294 reviews

Crew

8.6

Entertainment

7.5

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
American Airlines
7.2
Good
11,304 reviews
Southwest
8.0
Very good
4,294 reviews

Crew

8.6

Entertainment

7.5

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Wisconsin. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ontario to Wisconsin?

    Ontario (ONT), located 3.1 mi from the city center, is the airport you fly out of when you book flights from Ontario to Wisconsin.

  • How long is the flight from Ontario to Wisconsin?

    Frontier, United Airlines, and American Airlines can get you from Ontario to Wisconsin in just under 4h 03m. Your travel time can differ by up to 8h 16m. Airlines will cover a distance of 1695 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Ontario to Wisconsin one-way?

    $79 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on American Airlines and United Airlines, with prices starting from $114 and $159, respectively.

  • What are the most popular routes from Ontario to Wisconsin?

    The most popular flight routes from Ontario to Wisconsin are Ontario - Chicago O'Hare Intl, Ontario - Minneapolis St Paul and Ontario - Milwaukee-Mitchell.

  • Can I find deals for flights from Ontario to Wisconsin that include hotel bookings?

    Yes. In addition to deals on Ontario to Wisconsin flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Wisconsin?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Wisconsin.

  • Can I find deals for business class flights from Ontario to Wisconsin?

    Yes. Cheapflights offers flight deals from Ontario to Wisconsin by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Wisconsin?

    Currently, May is the cheapest month in which you can book a flight from Ontario to Wisconsin (average of $98). Flying from Ontario to Wisconsin in February is currently the most expensive (average of $283). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Ontario to Wisconsin

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Ontario to Wisconsin

Discover the top 4 airlines that operate flights from Ontario to Wisconsin. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 18, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$253Average$391FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$276Average$598FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$288Average$511FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$326Average$406FlexibilityNo cancel feeOn-time63%

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